Vehicle-brake.



H. c. WASHB URN.

VEHICLE BRAKE. APPLICATION FILED FE11M, 1912.

Patented Sept. 30, 1913.

WINES 958 HERBERT C. WASHBURN, 0F SUFFERN, NEW YORK.

VEHICLE-BRAKE.

Specification of Letters Patent.

Patented sept. 3o, 1913.

Appnnanon mea February r4, 1912. serial No. 677,420

To all 'whom t may concern.'

Be it known that l, HERBERT' C. lVAslI- BURN, a citizen of the linitedStates, residinel at Soliera, in the county of Rockland and State ol'New York, have invented new and 'useful improvements in Vehicle-Brakes,of which the following is a specification.

This invention relates t0 brakes Jfor vehicles and its object is toprovide certain pneumatic means controlled by the operator of thevehicle so that upon 'the application ot certain controlling means, therotation of the wheel may be prevented. as will 4be more fully describedin the following specification, set forth in the claim and illustratedin thel drawings, wherein,

Fignre 1 is a side elevation of the brake. Fig. 2 is a sectional planview of the device.

A cylinder :'i is rigidly secured to the frame of the vehicle, whoseaxle G is rotated in the usual manner by thc necessary motor, and as theaxle rotates and carries with it the pinion 7, a gear wheel 8 whichmeshes with the pinion is also rotated. The gear wheel 8 is providedwith a stud E), carrying a pitruan 10 connected with the piston rod 1lof the piston l2 contained in the cylinder 5. The rod l1 extends beyondthe piston and is squared atV its end 13 to tit in the cylinder. -Eachof the heads 1G and 17 are provided with pipes 18 and 19 connected witha common tube 20 divided at its Center by means of the walls 21 whichterminate in a valve seat 22 at. the lower end of a cylinder 23. Thisvalve seat 22 is provided for a piston 24. which may be thrown intoplace by means of a rod 25, operated at the seat of the driver of the,vehicle and which actuates the bell crank lever 2G to throw the piston'2st down upon the seat 22 and prevent communication between lhetwoportions ot the pipe 20 connected with the outlets 1S and 19.

As long as vthe vehicle is moving and the axle 6 rotating, the gearwheel S is moving andthe piston 12 operates to circulate air through theoutlets 18 and 19, the pipe 20 and the lower portion of the cylinder 23.When the rod 25 is operated to throw the fiston 24 down upon the seat22, the communication is interrupted between the two sections of thepipe 20 and the air is compressed in one or the otherend of the cylinder5 so as to otter an obstruction to the .tied and arranged withoutdeparting from movement'of the Jiston 12 and check the movement of thewheel 8 and axle 6.

With this device located at a convenient point on a vehicle, themovement of the axle and wheels may be checked without any se vere shockto the machine or vehicle itself whenthe rod 25 is opeiitted by means ofa brake lever near the dasli board or a lever convenient-ly located forthefdriver of the vehicle and the cempressible nature of air issuthcicnt to prevent any sudden stoppage which would be injurious to thevehicle. l 'lhis device may-be located at any convenient point on thevehicle and itis ob:

vious that its parts may be otherwise n1odi` the essential featuresabove described'.

The rod 11 is preferably made with a` threaded end -11 which screws intothe squared end 13 so the packing 12 may be compressed to at all timesform a perfect air tight wall. Instead of operating the device by airalone, oil or other liquids may be used to circulate through the ends ofthe cylinder, and a ball and socket joint may connect the pitman 10 withthe rod 11 so the packing may be adjusted without disconnecting any ofthe parts.

What I claim as new and by Letters Patent is,

ln a vehicle brake, the combination with Ydesire to secure a geared axle:if the vehicle; of a second" gear meshing with the said axle-gear, a',

cylinder having heads provided with openings, a piston within thecylinder, a piston rod passing through the piston and having one endsquared, a pitman connecting the other' end of the piston with the`second named gear, a pipe inserted in" each end o the cylinder, asecond pipe having tw branches connecting with A-the .two firstnamedpipes and further provided with fa valve seat at the pointl of division,aA valve ope-rating in the trunk of the second. pipe, a stein carried bythe valve,^a bell crank connected with the valve Stern, and means foroperating the bell crank.

Tn testimony whereof vI aliix my signature in presence of twowitnesses.4 I

HERBERT C. WASHBURN.

llVitnesses: v j

ALEX. AH. MERRITT, ConA L. ABRAMS.

